CN103014427B - Z-alloy containing silicon and preparation method thereof - Google Patents

Z-alloy containing silicon and preparation method thereof Download PDF

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CN103014427B
CN103014427B CN201210479474.XA CN201210479474A CN103014427B CN 103014427 B CN103014427 B CN 103014427B CN 201210479474 A CN201210479474 A CN 201210479474A CN 103014427 B CN103014427 B CN 103014427B
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alloy
ingot
aluminum
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silicon
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CN103014427A (en
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李逸人
臧辉东
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Hefei Changyuan Hydraulics Co Ltd
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Hefei Changyuan Hydraulics Co Ltd
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Abstract

The invention discloses a kind of Z-alloy containing silicon and preparation method thereof, each component formation is by mass percentage: silicon: 4.0-6.0%, copper: 0.7-1.3%, magnesium: 0.7-1.3%, manganese: 0.2-0.4%, tin: 3.5-4.5%, titanium: 0.15-0.35%, surplus are aluminium.Preparation method comprises: 1) prepare burden; 2) first put into 2/3 of the pure Al ingot of batching in crucible bottom, then add alloy successively, add remaining pure Al ingot after heat fused again, finally add pure magnesium ingot and pure tin ingot; 3) Heating temperature is stable when rising to 700-730 DEG C, adds comprehensive treatment agent and carries out refinement and denaturation process, leave standstill 10 minutes after skimming; 4) first ingot mold is preheated to 150-200 DEG C, then is poured in ingot mold with alloy aluminum liquid, be cooled to room temperature and can obtain Z-alloy.Z-alloy containing silicon of the present invention and preparation method thereof, the tensile strength sigma b >=180Mpa of Z-alloy, unit elongation δ >=10%, HBS >=90, are applicable to hydraulic gear pump axle sleeve material.

Description

Z-alloy containing silicon and preparation method thereof
Technical field
The present invention relates to a kind of Z-alloy containing silicon and preparation method thereof.
Background technology
Traditional Z-alloy ZAlSn 6cu 1nI 1, the advantage of this alloy is that thermal conductivity, thermotolerance, fatigue strength and hot strength are all high.But this traditional Z-alloy ZAlSn 6cu 1ni 1middle aluminium-Xi binary alloy, Sn content is at 5.5-7.0%, when liquid state, aluminium and tin can mutually dissolve in very large composition range, but the solid solubility of tin in aluminium minimum (≤0.01%), tin and aluminium can form the eutectic of low melting point (228.5 DEG C), eutectic in the form of sheets or be spherically free in aluminum grain boundaries, during Theil indices height, eutectic is that continuous tin film (plate crystal) surrounds aluminium grain, form netted tin aluminium eutectic tissue, the physical strength of this tissue is lower, have the coefficient of expansion larger, seizure resistance difference and the shortcoming such as castability is general, be unsuitable for hydraulic gear oil pump.
Traditional Z-alloy ZAlSn 6cu 1nI 1when being applied to hydraulic gear oil pump particularly high pressure gear oil pump (more than 25MPa) time, easily causing wearing and tearing to strengthen during long term operation, degradation phenomenon under volumetric efficiency.Therefore in practical application, need a kind of linear expansivity less, fatigue resistance and seizure resistance are all comparatively strong and mobility is better, be easy to the aluminum-based bearing material of casting.
Summary of the invention
The present invention is for avoiding the weak point that exists in above-mentioned prior art, the Z-alloy containing silicon that a kind of wear resistance, fatigue resistance and seizure resistance are high, linear expansivity is little is provided, additionally provide a kind of preparation method of described Z-alloy simultaneously, the method technique is simple, production cost is low, is suitable for suitability for industrialized production.
The present invention be technical solution problem by the following technical solutions.
Z-alloy containing silicon, be characterized in, the formation by mass percentage of each component in this Z-alloy is: silicon: 4.0-6.0%, copper: 0.7-1.3%, magnesium: 0.7-1.3%, manganese: 0.2-0.4%, tin: 3.5-4.5%, titanium: 0.15-0.35%, surplus are aluminium.
The preparation method of the Z-alloy containing silicon of the present invention, is characterized in that, comprise the following steps:
1), by fine aluminium ingot, pure magnesium ingot, pure tin ingot, 20% aluminum-silicon alloy, 50% Al-zn-mg-cu alloy, 10% aluminum-manganese alloy, 5% aluminum-titanium alloy prepare burden by the mass percentage content of composition each in Z-alloy: tin: 3.5-4.5%, silicon: 4.0-6.0%, copper: 0.7-1.3%, magnesium: 0.7-1.3%, manganese: 0.2-0.4%, titanium: 0.15-0.35%, all the other are Al; In the present invention, described all the other be that Al in Al comprises Al all in fine aluminium ingot, 20% aluminum-silicon alloy, 50% Al-zn-mg-cu alloy, 10% aluminum-manganese alloy, 5% aluminum-titanium alloy.In the present invention, in 20% aluminum-silicon alloy, silicone content is 20%, and all the other are aluminium; In described 50% Al-zn-mg-cu alloy, copper content is 50%, and all the other are aluminium; In described 10% aluminum-manganese alloy, Fe content is 10%, and all the other are aluminium; In described 5% aluminum-titanium alloy, titanium content is 5%, and all the other are aluminium.
2), 2/3 of the pure Al ingot of above-mentioned batching is first put in crucible bottom, then described 20% aluminum-silicon alloy, described 50% Al-zn-mg-cu alloy, described 10% aluminum-manganese alloy and described 5% aluminum-titanium alloy is added successively, add remaining pure Al ingot after heat fused again to regulate temperature, finally add pure magnesium ingot and pure tin ingot;
3), Heating temperature is stable when rising to 700-730 DEG C, can add immediately and account for above-mentioned steps 1) in the comprehensive treatment agent of raw-material gross weight 1% carry out refinement and denaturation process, leave standstill 10 minutes after skimming; Comprehensive treatment agent is that Jinan Hua Sai smithcraft Materials Co., Ltd produces, and its major ingredient is 35% saltpetre, 6% Graphite Powder 99,24% sodium-chlor, 30% silicon-dioxide, 5% titanizing aluminium
4), first ingot mold is preheated to 150-200 DEG C, then is poured in ingot mold with the alloy aluminum liquid that above-mentioned step 3) obtains, be cooled to room temperature and can obtain Z-alloy.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, Z-alloy of the present invention, is reduced to 3.5-4.5% stanniferous amount, reduces reticulation, thus improves eutectic tissue intensity.
2, Z-alloy of the present invention, adds the Si element of 4.0-6.0%, improves the mobility of alloy significantly, improve the castability of alloy in Al-Sn alloy substrate; In addition, element silicon is disperse educt Si hard phase in the base, and is evenly distributed, and contributes to the wear resistance of raising bearing metal, fatigue resistance and seizure resistance, reduces the linear expansivity of alloy.
3, Z-alloy of the present invention, adds a certain amount of copper alloy and magnesium alloy in the alloy, and part copper, magnesium alloy element are dissolved into efficient hardening matrix in sosoloid, and part copper, magnesium alloy element form θ (CuAl with aluminium respectively in addition 2) and S(Al 2cuMg) heavy alloyed physical strength and surface abrasion resistance is carried mutually.
4, Z-alloy of the present invention, adds the trace elements such as Ti, can form the compounds such as disperse shape TiAl on matrix, forms strengthening effect.
5, Z-alloy of the present invention, alloy is after artificial aging process, and α (Al) sosoloid+Sn phase+silicon phase+compound that is organized as of formation (mainly contains S(Al 2cuMg), θ (CuAl 2) phase, TiAl be equal), wherein main strengthening phase is silicon phase.
6, after artificial aging process, aluminium alloy of the present invention and traditional Z-alloy ZAlSn 6cu 1ni 1compare, tensile strength can be increased to 180Mpa, and hardness is increased to 90HBS, declines though unit elongation has but still reaches more than 10%, thus improves fatigue resistance and seizure resistance.Although its frictional coefficient improves, its mobility greatly improves, and is more easy to casting, and cost and ZAlSn 6cu 1ni 1compare also to have and reduce significantly.
Z-alloy containing silicon of the present invention, mobility better, fatigue resistance and seizure resistance all comparatively strong, tensile strength sigma b >=180Mpa, unit elongation δ >=10%, HBS >=90, castability is excellent, low price, is applicable to the need of production of middle high-pressure gear pump sleeve.
The preparation method of Z-alloy of the present invention, this technique is simple, and production cost is low, is suitable for suitability for industrialized production.
Below by way of embodiment, and the invention will be further described in conjunction with the embodiments.
Embodiment
Number in following embodiment is weight part.
Embodiment one:
The preparation of Z-alloy:
1) fine aluminium ingot, pure magnesium ingot, pure tin ingot, 20% aluminum-silicon alloy, 50% Al-zn-mg-cu alloy, 10% aluminum-manganese alloy, 5% aluminum-titanium alloy, is got, by Si:4.0 part, Cu:0.7 part, Mg:0.7 part, Mn:0.2 part, Sn:3.5 part, Ti:0.15 part, Al:90.75 part, prepare; The Al of described 90.75 parts comprises Al all in fine aluminium ingot, 20% aluminum-silicon alloy, 50% Al-zn-mg-cu alloy, 10% aluminum-manganese alloy and 5% aluminum-titanium alloy.Described all the other be that Al in Al comprises Al all in fine aluminium ingot, 20% aluminum-silicon alloy, 50% Al-zn-mg-cu alloy, 10% aluminum-manganese alloy, 5% aluminum-titanium alloy.In the present invention, in 20% aluminum-silicon alloy, silicone content is 20%, and all the other are aluminium; In described 50% Al-zn-mg-cu alloy, copper content is 50%, and all the other are aluminium; In described 10% aluminum-manganese alloy, Fe content is 10%, and all the other are aluminium; In described 5% aluminum-titanium alloy, titanium content is 5%, and all the other are aluminium.
2), 2/3 of above-mentioned batching Al ingot is first put in crucible bottom, then described 20% aluminum-silicon alloy, described 50% Al-zn-mg-cu alloy, described 10% aluminum-manganese alloy and described 5% aluminum-titanium alloy is added successively, add remaining pure Al ingot after heat fused again to regulate temperature, finally add pure magnesium ingot and pure tin ingot;
3), Heating temperature is stable when rising to 700-730 DEG C, can add above-mentioned steps 1 immediately) in 1% comprehensive treatment agent of starting material gross weight carry out refinement and denaturation process, leave standstill 10 minutes after skimming;
4), first ingot mold is preheated to 150-170 DEG C, then is poured in ingot mold with the alloy aluminum liquid that step 3) obtains, be cooled to room temperature and can obtain Z-alloy.
Embodiment two:
The preparation of Z-alloy:
1) fine aluminium ingot, pure magnesium ingot, pure tin ingot, 20% aluminum-silicon alloy, 50% Al-zn-mg-cu alloy, 10% aluminum-manganese alloy, 5% aluminum-titanium alloy, is got, by Si:6.0 part, Cu:1.3 part, Mg:1.3 part, Mn:0.4 part, Sn:4.5 part, Ti0.35 part, Al:86.15 part, prepare.The Al of described 86.15 parts comprises Al all in fine aluminium ingot, 20% aluminum-silicon alloy, 50% Al-zn-mg-cu alloy, 10% aluminum-manganese alloy and 5% aluminum-titanium alloy.
2), 2/3 of above-mentioned batching Al ingot is first put in crucible bottom, then described 20% aluminum-silicon alloy, 50% Al-zn-mg-cu alloy, 10% aluminum-manganese alloy, 5% aluminum-titanium alloy is added successively, add remaining pure Al ingot after heat fused again to regulate temperature, finally add pure magnesium ingot and pure tin ingot.
3), Heating temperature is stable when rising to 700-730 DEG C, can add above-mentioned steps 1 immediately) in 1% comprehensive treatment agent of starting material gross weight carry out refinement and denaturation process, leave standstill 10 minutes after skimming;
4), first ingot mold is preheated to 170-180 DEG C, then is poured in ingot mold with the alloy aluminum liquid that step 3) obtains, be cooled to room temperature and can obtain Z-alloy.
Embodiment three:
The preparation of Z-alloy:
1) fine aluminium ingot, pure magnesium ingot, pure tin ingot, 20% aluminum-silicon alloy, 50% Al-zn-mg-cu alloy, 10% aluminum-manganese alloy, 5% aluminum-titanium alloy, is got, by Si:5.0 part, Cu:1.0 part, Mg:1.0 part, Mn:0.3 part, Sn:4.0 part, Ti0.25 part, Al:88.45 part, prepare.The Al of described 88.45 parts comprises Al all in fine aluminium ingot, 20% aluminum-silicon alloy, 50% Al-zn-mg-cu alloy, 10% aluminum-manganese alloy and 5% aluminum-titanium alloy.
2), 2/3 of above-mentioned batching Al ingot is first put in crucible bottom, then 20% aluminum-silicon alloy, 50% Al-zn-mg-cu alloy, 10% aluminum-manganese alloy, 5% aluminum-titanium alloy is added successively, add remaining pure Al ingot after heat fused again to regulate temperature, finally add pure magnesium ingot and pure tin ingot.
3), Heating temperature is stable when rising to 700-730 DEG C, can add above-mentioned steps 1 immediately) in 1% comprehensive treatment agent of starting material gross weight carry out refinement and denaturation process, leave standstill 10 minutes after skimming.
4), first ingot mold is preheated to 180-200 DEG C, then is poured in ingot mold with the alloy aluminum liquid that step 3) obtains, be cooled to room temperature and can obtain Z-alloy.
In the present invention, the comprehensive treatment agent of indication is the product that Jinan Hua Sai smithcraft Materials Co., Ltd produces, and its each composition according to the content of mass percent is: saltpetre: 35%, Graphite Powder 99: 6%, sodium-chlor: 24%, silicon-dioxide: 30%, titanizing aluminium: 5%.
Experimental data
Following table is the index parameter of the Z-alloy of different components, and wherein contrast material is ZAlSn 6cu 1ni 1, the product of product 1-3 for taking the technology of the present invention to obtain.
From upper table, contrast material ZAlSn 6cu 1ni 1hardness is lower, and its performance index such as tensile strength and unit elongation are poor.
From product 1-3 performance, product of the present invention is while having increased considerably Si content, reduce Sn content, after adding the elements such as Mg, Mn, Ti simultaneously, the hardness of alloy significantly improves, tensile strength increases, and decline though unit elongation has but still reach more than 10%, fatigue resistance and seizure resistance all have larger enhancing.Particularly the significantly increase of silicon content, drastically increases the mobility of alloy, reduces the cost of alloy, improves the castability of foundry goods.

Claims (2)

1. the Z-alloy containing silicon, it is characterized in that, the formation by mass percentage of each component in this Z-alloy is: silicon: 4.0-6.0%, copper: 0.7-1.3%, magnesium: 0.7-1.3%, manganese: 0.2-0.4%, tin: 3.5-4.5%, titanium: 0.15-0.35%, surplus are aluminium.
2. the preparation method of the Z-alloy containing silicon according to claim 1, is characterized in that, comprise the following steps:
1), by fine aluminium ingot, pure magnesium ingot, pure tin ingot, 20% aluminum-silicon alloy, 50% Al-zn-mg-cu alloy, 10% aluminum-manganese alloy, 5% aluminum-titanium alloy prepare burden by the mass percentage content of composition each in Z-alloy: tin: 3.5-4.5%, silicon: 4.0-6.0%, copper: 0.7-1.3%, magnesium: 0.7-1.3%, manganese: 0.2-0.4%, titanium: 0.15-0.35%, all the other are Al;
2), 2/3 of the pure Al ingot of above-mentioned batching is first put in crucible bottom, then described 20% aluminum-silicon alloy, described 50% Al-zn-mg-cu alloy, described 10% aluminum-manganese alloy and described 5% aluminum-titanium alloy is added successively, add remaining pure Al ingot after heat fused again to regulate temperature, finally add pure magnesium ingot and pure tin ingot;
3), Heating temperature is stable when rising to 700-730 DEG C, adds and accounts for above-mentioned steps 1) in the comprehensive treatment agent of raw-material gross weight 1% carry out refinement and denaturation process, leave standstill 10 minutes after skimming; The major ingredient of described comprehensive treatment agent is: 35% saltpetre, 6% Graphite Powder 99,24% sodium-chlor, 30% silicon-dioxide, 5% titanizing aluminium;
4), first ingot mold being preheated to 150-200 DEG C, then using above-mentioned steps 3) the alloy aluminum liquid that obtains is poured in ingot mold, and be cooled to room temperature and can obtain Z-alloy.
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CN103469020A (en) * 2013-08-12 2013-12-25 安徽盛达前亮铝业有限公司 Low-expansion aluminum alloy section material and preparation method thereof
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Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS5693849A (en) * 1979-12-27 1981-07-29 Showa Alum Ind Kk Bearing use aluminum alloy and production thereof
JPS6056220B2 (en) * 1980-03-01 1985-12-09 昭和軽金属株式会社 aluminum bearing alloy
CN101705396A (en) * 2009-12-14 2010-05-12 南京信息工程大学 Aluminum-based bearing compound material and preparation method thereof
CN102747256A (en) * 2012-06-19 2012-10-24 东南大学 Aluminum-silicon based aluminum section and preparation technology thereof

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JP3857503B2 (en) * 2000-07-26 2006-12-13 大同メタル工業株式会社 Aluminum bearing alloy

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5693849A (en) * 1979-12-27 1981-07-29 Showa Alum Ind Kk Bearing use aluminum alloy and production thereof
JPS6056220B2 (en) * 1980-03-01 1985-12-09 昭和軽金属株式会社 aluminum bearing alloy
CN101705396A (en) * 2009-12-14 2010-05-12 南京信息工程大学 Aluminum-based bearing compound material and preparation method thereof
CN102747256A (en) * 2012-06-19 2012-10-24 东南大学 Aluminum-silicon based aluminum section and preparation technology thereof

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